Lightning-arrester.



J. B. SIRUBLE. LIGHTNING ARRESTBR. A APPLICATION FILED DEOJO, 1906.901,207. Patented Oct. 13, 1908.

FIG-1 FIG. a.

INVENTDR wrru asses;

UNTTED sTATEs PATENT oEEioE.

JACOB B. STRUBLE, OF WILKINSBURG, PENNSYLVANIA.

LIGHTNING-ARRESTER?.

To all whom 'it may concern:

Be it known that I, JACOB B. STnULE1'e siding at 7ilkinsburg, in thecounty of Allegheny and State of Pennsylvania, a citizen of the UnitedStates, haveinvented or discovered certain new and useful lImprovementsin Lightning-Arresters, of which improvement the following is aspecification.

The invention described herein relates to Specification of LettersPatent'. Application led. December 10,1906. Serial No. 347,092.

certain improvements in lightning arresters and has for its object theprovision of a case or shell for inclosinvr the elements of thearrester, consisting of means between which an arc can be formed, an arcdampener and terminals so constructed as to permit of the easy insertionand removal of said elements, and provided with one or more adjustablecontacts.

The invention is hereinafter more fully described and claimed.

In the accompanying drawing forming a part of this specification, Figure1 is a sectional plan view of my improved construction; Fig. Q is asectional elevation on a plane indicated by the line II-II Fig. 1; Fig.3 is a top plan View of a modified form; Fig. 4 is a sectional elevationof the same; Fig. 5 is a sectional elevation of a further modificationiand Fig. 6 is a section on a plane indicated by the line VI--VI Fig. 5.

In the practice of my invention the case or shell 1 is formed ofporcelain rubber or other suitable insulating material, and is providedwith suitable means such as flanges Q, whereby the shell may be securedto a suitable support. In the construction shown in Figs. 1 and '2, thecase or shell is constructed to entirely inclose the lightning arrester,an opening being formed in the Tower end ofl the case for the insertionof the arrester elements. This opening in the lower end is closed by acover or cap 3 also formed of insulating material and secured inposition by any suitable means as cement as shown. A. vent or opening 4is provided preferably in the cover 3 as shown in Fig. Q. The arresterelement consists of a body 5 of suitable material such as pulverizedcarbon and a binder as silicate of soda having sufficient resistance todamp the arc and having on opposite sides contact plates 6, one of whichis adapted to electrically connect with one of the circuit terminalsextending out through the case or shell as hereinafter described. Aperforated sheet 7 of insulating material is interposed between theother contact plate 6 Patented Oct. 13, 1908.

and a metal plate 84 against which the terminal will bear. As shown inFigs. 3 and 4, this plate 8 may` be formed by the head of one of theterminals.

Holes are formed in the walls of 'the case or shell for the passage ofthe terminals 9, provided at their inner ends with heads 10 adapted tobear upon the contactplates of the arrester. These terminals may beremovably secured in the side 'wallsof the shell or case as shown inFigs. 1 and 9., in. which case the cont-act port-ions of the arresterelement are provided with resilient portions a which are forced intocontact with the heads 10 when the element is placed in position, theelement being retained in the shell by the cover 3. As shown in Figs. 3and 4, the terminals may be adjustably secured in position, they beingscrewed into a sleeve 11 provided with a head and projecting into theopening in the wall of the shell. The terminal and sleeve are locked inposition by a nut 12.

In Figs. 3 and 4 is shown a construction which can be employed, Wherethe complete inclosure of the combined dampener and spark gap, is notnecessary or desirable. In this form the shell is constructed with anopen top, so that the shell has a socket form, into which the combineddampener and gap are inserted. In order to prevent dirt lodging withinthe case or shell, an opening for the escape thereof is formed in thebottom of the shell.

Figs. 5 and 6 illustrate a modification of the construction shown inFigs. 1 and Q. The shell or case is constructed to entirely inclose thearrester, the opening in its lower end or base being closed by a. ventedcover or lid 3, which as in the construction shown in Figs. 1 and 2, issecured in position by any suitable means, preferably cement..

The terminals 9a are inserted through openings in the top of the shell,and vare electrically connected inside of the shell to the contactplates of the arrester by conducting strips 13 and 14 preferably ingrooves in the side walls of the shell. One of the walls of the shell isprovided with a project-- ing seat 15 for the inner end of one of theconducting strips between which and the contact plate 16 of the dampingmember of the arrester is interposed a perforated sheet 17 of micahaving a thickness proportional to the resistance desired in thearrester. The other conducting strip is electrically con -nectied to acontact. plate of the dampingmember by a screw 18 and nut 19. As shownthe screw passes through the Wall of the shell, the conducting strip 14and the nut, which is held from turning by lugs .20 on the conductingstrip or any other suitable means. l/Vhen the arrester is placed inposition the screw .is pushed in until it hears against the Contactplate of the arrester and then rotated, causing the nut to move outwardand bear against the strip which in turn bears against the Wall of theshell.

lI claim herein as my invention:

l.. A lightning arrest-er having in combination means for :formingr aspark gap and means for damping an arc, provided with resilient contactportions, a case formed of insulating,- material and constructed to inelose the arrester elements and provided with an. opening for theinsertion oi the arrester i elements,` terminals extending through thewalls of the case and having portions adapted to bear on the contactportions of the arrest-er, and constructed to hold the arrester in`position in the case and a lid or cover for the opening of the case.

2. A lightning arrester having in combination a case formed ofinsulating material, separable arrester elements arranged in the case,terminals one of which is adjustable extendingr through the Walls of thecase and adapted to electrically contact with the arrester elements andhold the latter in operative relation with each other.

In testimony whereof, I have hereunto set my hand.

JACOB B. STRUllQlC.

fitnesses VVUJJAM Winsen CHARLES ,BAnN n'r'r.

